From mboxrd@z Thu Jan 1 00:00:00 1970 From: maxime.ripard@free-electrons.com (Maxime Ripard) Date: Wed, 9 Nov 2011 11:19:36 +0100 Subject: [PATCH 3/3] ARM: AT91: Add the ADC to the sam9g20ek board In-Reply-To: <1320833976-32689-1-git-send-email-maxime.ripard@free-electrons.com> References: <1319041134-19712-1-git-send-email-maxime.ripard@free-electrons.com> <1320833976-32689-1-git-send-email-maxime.ripard@free-electrons.com> Message-ID: <1320833976-32689-4-git-send-email-maxime.ripard@free-electrons.com> To: linux-arm-kernel@lists.infradead.org List-Id: linux-arm-kernel.lists.infradead.org Cc: Nicolas Ferre Cc: Patrice Vilchez Cc: Thomas Petazzoni Signed-off-by: Maxime Ripard --- arch/arm/mach-at91/at91sam9260_devices.c | 52 ++++++++++++++++++++++++++++++ arch/arm/mach-at91/board-sam9g20ek.c | 11 ++++++ 2 files changed, 63 insertions(+), 0 deletions(-) diff --git a/arch/arm/mach-at91/at91sam9260_devices.c b/arch/arm/mach-at91/at91sam9260_devices.c index 39f81f4..0859553 100644 --- a/arch/arm/mach-at91/at91sam9260_devices.c +++ b/arch/arm/mach-at91/at91sam9260_devices.c @@ -1312,6 +1312,58 @@ void __init at91_add_device_cf(struct at91_cf_data *data) void __init at91_add_device_cf(struct at91_cf_data * data) {} #endif +/* -------------------------------------------------------------------- + * ADCs + * -------------------------------------------------------------------- */ + +static struct at91_adc_data adc_data; + +static struct resource adc_resources[] = { + [0] = { + .start = AT91SAM9260_BASE_ADC, + .end = AT91SAM9260_BASE_ADC + SZ_16K - 1, + .flags = IORESOURCE_MEM, + }, + [1] = { + .start = AT91SAM9260_ID_ADC, + .end = AT91SAM9260_ID_ADC, + .flags = IORESOURCE_IRQ, + }, +}; + +static struct platform_device at91_adc_device = { + .name = "at91adc", + .id = -1, + .dev = { + .platform_data = &adc_data, + }, + .resource = adc_resources, + .num_resources = ARRAY_SIZE(adc_resources), +}; + +void __init at91_add_device_adc(struct at91_adc_data *data) +{ + if (!data) + return; + + if (test_bit(0, &(data->channels_used))) + at91_set_A_periph(AT91_PIN_PC0, 0); + if (test_bit(1, &(data->channels_used))) + at91_set_A_periph(AT91_PIN_PC1, 0); + if (test_bit(2, &(data->channels_used))) + at91_set_A_periph(AT91_PIN_PC2, 0); + if (test_bit(3, &(data->channels_used))) + at91_set_A_periph(AT91_PIN_PC3, 0); + + data->adc_clock = 5000000; + data->num_channels = 4; + data->startup_time = 10; + + adc_data = *data; + platform_device_register(&at91_adc_device); +} + + /* -------------------------------------------------------------------- */ /* * These devices are always present and don't need any board-specific diff --git a/arch/arm/mach-at91/board-sam9g20ek.c b/arch/arm/mach-at91/board-sam9g20ek.c index 817f59d..e34d41a 100644 --- a/arch/arm/mach-at91/board-sam9g20ek.c +++ b/arch/arm/mach-at91/board-sam9g20ek.c @@ -314,6 +314,15 @@ static void __init ek_add_device_buttons(void) static void __init ek_add_device_buttons(void) {} #endif +/* + * ADCs + */ + +static struct at91_adc_data ek_adc_data = { + .channels_used = BIT(0) | BIT(1) | BIT(2) | BIT(3), + .vref = 3300, +}; + #if defined(CONFIG_REGULATOR_FIXED_VOLTAGE) || defined(CONFIG_REGULATOR_FIXED_VOLTAGE_MODULE) static struct regulator_consumer_supply ek_audio_consumer_supplies[] = { REGULATOR_SUPPLY("AVDD", "0-001b"), @@ -389,6 +398,8 @@ static void __init ek_board_init(void) ek_add_device_gpio_leds(); /* Push Buttons */ ek_add_device_buttons(); + /* ADCs */ + at91_add_device_adc(&ek_adc_data); /* PCK0 provides MCLK to the WM8731 */ at91_set_B_periph(AT91_PIN_PC1, 0); /* SSC (for WM8731) */ -- 1.7.4.1